thermal: allow thermal_hal to read sysfs_gpu

Update the sepolicy for thermalhal to read sysfs_gpu to access the basic
gpu info.

Bug: 336698561
Test: Flash Build and boot to home, run adb shell dumpsys android.hardware.thermal.IThermal/default, check the cdevceiling and hardlimit number for gpu
Change-Id: I6e722e108284ee0d7a0c86a9e50749ecf4b354a5
Signed-off-by: Peter (YM) <peterym@google.com>
diff --git a/thermal/sepolicy/thermal_hal/hal_thermal_default.te b/thermal/sepolicy/thermal_hal/hal_thermal_default.te
index 45ccf3a..41a0f5e 100644
--- a/thermal/sepolicy/thermal_hal/hal_thermal_default.te
+++ b/thermal/sepolicy/thermal_hal/hal_thermal_default.te
@@ -5,6 +5,7 @@
 allow hal_thermal_default proc_stat:file r_file_perms;
 allow hal_thermal_default self:netlink_generic_socket create_socket_perms_no_ioctl;
 allow hal_thermal_default self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl;
+allow hal_thermal_default sysfs_gpu:file r_file_perms;
 
 hal_client_domain(hal_thermal_default, hal_power);